lustre/quota/quota_adjust_qunit.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #ifndef EXPORT_SYMTAB
  37 # define EXPORT_SYMTAB
  38 #endif
  39 #define DEBUG_SUBSYSTEM S_LQUOTA
  40
  41 #ifdef __KERNEL__
  42 # include <linux/version.h>
  43 # include <linux/module.h>
  44 # include <linux/init.h>
  45 # include <linux/fs.h>
  46 # include <linux/jbd.h>
  47 # include <linux/quota.h>
  48 # include <linux/smp_lock.h>
  49 # include <linux/buffer_head.h>
  50 # include <linux/workqueue.h>
  51 # include <linux/mount.h>
  52 #else /* __KERNEL__ */
  53 # include <liblustre.h>
  54 #endif
  55
  56 #include <obd_class.h>
  57 #include <lustre_mds.h>
  58 #include <lustre_dlm.h>
  59 #include <lustre_cfg.h>
  60 #include <obd_ost.h>
  61 #include <lustre_fsfilt.h>
  62 #include <linux/lustre_quota.h>
  63 #include "quota_internal.h"
  64
  65 #ifdef HAVE_QUOTA_SUPPORT
  66
  67 #ifdef __KERNEL__
  68 /**
  69  * This function is charge of recording lqs_ino_rec and
  70  * lqs_blk_rec. when a lquota slave checks a quota
  71  * request(check_cur_qunit) and finishes a quota
  72  * request(dqacq_completion), it will be called.
  73  * is_chk: whether it is checking quota; otherwise, it is finishing
  74  * is_acq: whether it is acquiring; otherwise, it is releasing
  75  */
  76 void quota_compute_lqs(struct qunit_data *qdata, struct lustre_qunit_size *lqs,
  77                        int is_chk, int is_acq)
  78 {
  79         long long *rec;
  80
  81         LASSERT(qdata && lqs);
  82         LASSERT_SPIN_LOCKED(&lqs->lqs_lock);
  83
  84         rec = QDATA_IS_BLK(qdata) ? &lqs->lqs_blk_rec : &lqs->lqs_ino_rec;
  85
  86         if (!!is_chk + !!is_acq == 1)
  87                 *rec -= qdata->qd_count;
  88         else
  89                 *rec += qdata->qd_count;
  90
  91 }
  92
  93 static struct lustre_qunit_size *
  94 quota_create_lqs(unsigned long long lqs_key, struct lustre_quota_ctxt *qctxt)
  95 {
  96         struct lustre_qunit_size *lqs = NULL;
  97         int rc = 0;
  98
  99         OBD_ALLOC_PTR(lqs);
 100         if (!lqs)
 101                 GOTO(out, rc = -ENOMEM);
 102
 103         lqs->lqs_key = lqs_key;
 104
 105         spin_lock_init(&lqs->lqs_lock);
 106         lqs->lqs_bwrite_pending = 0;
 107         lqs->lqs_iwrite_pending = 0;
 108         lqs->lqs_ino_rec = 0;
 109         lqs->lqs_blk_rec = 0;
 110         lqs->lqs_id = LQS_KEY_ID(lqs->lqs_key);
 111         lqs->lqs_flags = LQS_KEY_GRP(lqs->lqs_key) ? LQUOTA_FLAGS_GRP : 0;
 112         lqs->lqs_bunit_sz = qctxt->lqc_bunit_sz;
 113         lqs->lqs_iunit_sz = qctxt->lqc_iunit_sz;
 114         lqs->lqs_btune_sz = qctxt->lqc_btune_sz;
 115         lqs->lqs_itune_sz = qctxt->lqc_itune_sz;
 116         lqs->lqs_ctxt = qctxt;
 117         if (qctxt->lqc_handler) {
 118                 lqs->lqs_last_bshrink  = 0;
 119                 lqs->lqs_last_ishrink  = 0;
 120         }
 121         lqs_initref(lqs);
 122
 123         spin_lock(&qctxt->lqc_lock);
 124         if (!qctxt->lqc_valid)
 125                 rc = -EBUSY;
 126         else
 127                 rc = cfs_hash_add_unique(qctxt->lqc_lqs_hash,
 128                                          &lqs->lqs_key, &lqs->lqs_hash);
 129         spin_unlock(&qctxt->lqc_lock);
 130
 131         if (!rc)
 132                 lqs_getref(lqs);
 133
 134  out:
 135         if (rc && lqs)
 136                 OBD_FREE_PTR(lqs);
 137
 138         if (rc)
 139                 return ERR_PTR(rc);
 140         else
 141                 return lqs;
 142 }
 143
 144 struct lustre_qunit_size *quota_search_lqs(unsigned long long lqs_key,
 145                                            struct lustre_quota_ctxt *qctxt,
 146                                            int create)
 147 {
 148         struct lustre_qunit_size *lqs;
 149         int rc = 0;
 150
 151  search_lqs:
 152         lqs = cfs_hash_lookup(qctxt->lqc_lqs_hash, &lqs_key);
 153         if (IS_ERR(lqs))
 154                 GOTO(out, rc = PTR_ERR(lqs));
 155
 156         if (create && lqs == NULL) {
 157                 /* if quota_create_lqs is successful, it will get a
 158                  * ref to the lqs. The ref will be released when
 159                  * qctxt_cleanup() or quota is nullified */
 160                 lqs = quota_create_lqs(lqs_key, qctxt);
 161                 if (IS_ERR(lqs))
 162                         rc = PTR_ERR(lqs);
 163                 if (rc == -EALREADY)
 164                         GOTO(search_lqs, rc = 0);
 165                 /* get a reference for the caller when creating lqs
 166                  * successfully */
 167                 if (rc == 0)
 168                         lqs_getref(lqs);
 169         }
 170
 171         if (lqs && rc == 0)
 172                 LQS_DEBUG(lqs, "%s\n",
 173                           (create == 1 ? "create lqs" : "search lqs"));
 174
 175  out:
 176         if (rc == 0) {
 177                 return lqs;
 178         } else {
 179                 CERROR("get lqs error(rc: %d)\n", rc);
 180                 return ERR_PTR(rc);
 181         }
 182 }
 183
 184 int quota_adjust_slave_lqs(struct quota_adjust_qunit *oqaq,
 185                            struct lustre_quota_ctxt *qctxt)
 186 {
 187         struct lustre_qunit_size *lqs = NULL;
 188         unsigned long *unit, *tune;
 189         signed long tmp = 0;
 190         cfs_time_t time_limit = 0, *shrink;
 191         int i, rc = 0;
 192         ENTRY;
 193
 194         LASSERT(qctxt);
 195         lqs = quota_search_lqs(LQS_KEY(QAQ_IS_GRP(oqaq), oqaq->qaq_id),
 196                                qctxt, QAQ_IS_CREATE_LQS(oqaq) ? 1 : 0);
 197         if (lqs == NULL || IS_ERR(lqs)){
 198                 CERROR("fail to find a lqs for %sid %u!\n",
 199                        QAQ_IS_GRP(oqaq) ? "g" : "u", oqaq->qaq_id);
 200                 RETURN(PTR_ERR(lqs));
 201         }
 202
 203         CDEBUG(D_QUOTA, "before: bunit: %lu, iunit: %lu.\n",
 204                lqs->lqs_bunit_sz, lqs->lqs_iunit_sz);
 205         spin_lock(&lqs->lqs_lock);
 206         for (i = 0; i < 2; i++) {
 207                 if (i == 0 && !QAQ_IS_ADJBLK(oqaq))
 208                         continue;
 209
 210                 if (i == 1 && !QAQ_IS_ADJINO(oqaq))
 211                         continue;
 212
 213                 tmp = i ? (lqs->lqs_iunit_sz - oqaq->qaq_iunit_sz) :
 214                           (lqs->lqs_bunit_sz - oqaq->qaq_bunit_sz);
 215                 shrink = i ? &lqs->lqs_last_ishrink :
 216                              &lqs->lqs_last_bshrink;
 217                 time_limit = cfs_time_add(i ? lqs->lqs_last_ishrink :
 218                                               lqs->lqs_last_bshrink,
 219                                    cfs_time_seconds(qctxt->lqc_switch_seconds));
 220                 unit = i ? &lqs->lqs_iunit_sz : &lqs->lqs_bunit_sz;
 221                 tune = i ? &lqs->lqs_itune_sz : &lqs->lqs_btune_sz;
 222
 223                 /* quota master shrinks */
 224                 if (qctxt->lqc_handler && tmp > 0)
 225                         *shrink = cfs_time_current();
 226
 227                 /* quota master enlarges */
 228                 if (qctxt->lqc_handler && tmp < 0) {
 229                         /* in case of ping-pong effect, don't enlarge lqs
 230                          * in a short time */
 231                         if (*shrink &&
 232                             cfs_time_before(cfs_time_current(), time_limit))
 233                                 tmp = 0;
 234                 }
 235
 236                 /* when setquota, don't enlarge lqs b=18616 */
 237                 if (QAQ_IS_CREATE_LQS(oqaq) && tmp < 0)
 238                         tmp = 0;
 239
 240                 if (tmp != 0) {
 241                         *unit = i ? oqaq->qaq_iunit_sz : oqaq->qaq_bunit_sz;
 242                         *tune = (*unit) / 2;
 243                 }
 244
 245
 246                 if (tmp > 0)
 247                         rc |= i ? LQS_INO_DECREASE : LQS_BLK_DECREASE;
 248                 if (tmp < 0)
 249                         rc |= i ? LQS_INO_INCREASE : LQS_BLK_INCREASE;
 250         }
 251         spin_unlock(&lqs->lqs_lock);
 252         CDEBUG(D_QUOTA, "after: bunit: %lu, iunit: %lu.\n",
 253                lqs->lqs_bunit_sz, lqs->lqs_iunit_sz);
 254
 255         lqs_putref(lqs);
 256
 257         RETURN(rc);
 258 }
 259
 260 int filter_quota_adjust_qunit(struct obd_export *exp,
 261                               struct quota_adjust_qunit *oqaq,
 262                               struct lustre_quota_ctxt *qctxt)
 263 {
 264         struct obd_device *obd = exp->exp_obd;
 265         unsigned int id[MAXQUOTAS] = { 0, 0 };
 266         int rc = 0;
 267         ENTRY;
 268
 269         LASSERT(oqaq);
 270         LASSERT(QAQ_IS_ADJBLK(oqaq));
 271         rc = quota_adjust_slave_lqs(oqaq, qctxt);
 272         if (rc < 0) {
 273                 CERROR("adjust mds slave's qunit size failed!(rc:%d)\n", rc);
 274                 RETURN(rc);
 275         }
 276         if (QAQ_IS_GRP(oqaq))
 277                 id[GRPQUOTA] = oqaq->qaq_id;
 278         else
 279                 id[USRQUOTA] = oqaq->qaq_id;
 280
 281         if (rc > 0) {
 282                 rc = qctxt_adjust_qunit(obd, qctxt, id, 1, 0, NULL);
 283                 if (rc == -EDQUOT || rc == -EBUSY ||
 284                     rc == QUOTA_REQ_RETURNED || rc == -EAGAIN) {
 285                         CDEBUG(D_QUOTA, "rc: %d.\n", rc);
 286                         rc = 0;
 287                 }
 288                 if (rc)
 289                         CERROR("slave adjust block quota failed!(rc:%d)\n", rc);
 290         }
 291         RETURN(rc);
 292 }
 293 #endif /* __KERNEL__ */
 294 #endif
 295
 296 int client_quota_adjust_qunit(struct obd_export *exp,
 297                               struct quota_adjust_qunit *oqaq,
 298                               struct lustre_quota_ctxt *qctxt)
 299 {
 300         struct ptlrpc_request *req;
 301         struct quota_adjust_qunit *oqa;
 302         int rc = 0;
 303         ENTRY;
 304
 305         /* client don't support this kind of operation, abort it */
 306         if (!(exp->exp_connect_flags & OBD_CONNECT_CHANGE_QS)) {
 307                 CDEBUG(D_QUOTA, "osc: %s don't support change qunit size\n",
 308                        exp->exp_obd->obd_name);
 309                 RETURN(rc);
 310         }
 311         if (strcmp(exp->exp_obd->obd_type->typ_name, LUSTRE_OSC_NAME))
 312                 RETURN(-EINVAL);
 313
 314         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 315                                         &RQF_OST_QUOTA_ADJUST_QUNIT,
 316                                         LUSTRE_OST_VERSION,
 317                                         OST_QUOTA_ADJUST_QUNIT);
 318         if (req == NULL)
 319                 RETURN(-ENOMEM);
 320
 321         oqa = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_ADJUST_QUNIT);
 322         *oqa = *oqaq;
 323
 324         ptlrpc_request_set_replen(req);
 325
 326         rc = ptlrpc_queue_wait(req);
 327         if (rc)
 328                 CERROR("%s: %s failed: rc = %d\n", exp->exp_obd->obd_name,
 329                        __FUNCTION__, rc);
 330         ptlrpc_req_finished(req);
 331         RETURN (rc);
 332 }
 333
 334 int lov_quota_adjust_qunit(struct obd_export *exp,
 335                            struct quota_adjust_qunit *oqaq,
 336                            struct lustre_quota_ctxt *qctxt)
 337 {
 338         struct obd_device *obd = class_exp2obd(exp);
 339         struct lov_obd *lov = &obd->u.lov;
 340         int i, rc = 0;
 341         ENTRY;
 342
 343         if (!QAQ_IS_ADJBLK(oqaq)) {
 344                 CERROR("bad qaq_flags %x for lov obd.\n", oqaq->qaq_flags);
 345                 RETURN(-EFAULT);
 346         }
 347
 348         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 349                 int err;
 350
 351                 if (!lov->lov_tgts[i]->ltd_active) {
 352                         CDEBUG(D_HA, "ost %d is inactive\n", i);
 353                         continue;
 354                 }
 355
 356                 err = obd_quota_adjust_qunit(lov->lov_tgts[i]->ltd_exp, oqaq,
 357                                              NULL);
 358                 if (err) {
 359                         if (lov->lov_tgts[i]->ltd_active && !rc)
 360                                 rc = err;
 361                         continue;
 362                 }
 363         }
 364         RETURN(rc);
 365 }